diff --git a/datatrails-common-api/assets/v2/assets/eventresponsejsonapi.proto b/datatrails-common-api/assets/v2/assets/eventresponsejsonapi.proto
index e9463ae..74631a0 100644
--- a/datatrails-common-api/assets/v2/assets/eventresponsejsonapi.proto
+++ b/datatrails-common-api/assets/v2/assets/eventresponsejsonapi.proto
@@ -11,7 +11,6 @@ syntax = "proto3";
 package archivist.v2;
 option go_package="github.com/datatrails/go-datatrails-common-api-gen/assets/v2/assets;assets";
 import "protoc-gen-openapiv2/options/annotations.proto";
-import "datatrails-common-api/assets/v2/assets/enums.proto";
 import "datatrails-common-api/assets/v2/assets/principal.proto";
 import "datatrails-common-api/assets/v2/assets/merklelogentry.proto";
 
diff --git a/datatrails-common-api/assets/v2/assets/listevents.proto b/datatrails-common-api/assets/v2/assets/listevents.proto
index e98eba2..f652d6e 100644
--- a/datatrails-common-api/assets/v2/assets/listevents.proto
+++ b/datatrails-common-api/assets/v2/assets/listevents.proto
@@ -160,6 +160,13 @@ message ListEventsRequest {
         },
         (validate.rules).enum.defined_only = true
     ];
+
+    optional string transaction_id = 27 [
+        (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_field) = {
+            description: "hash of transaction commiting this event to blockchain"
+            type: STRING
+        }
+    ];
 }
 
 message ListEventsResponse {